NGC 7789 in Cassiopeia, Caroline's Rose

NGC 7789, the White Rose Cluster or Caroline's Rose

named after its discoverer, Caroline Herschel.

Hover over the picture for an annotated version

Date:  26 September 2021

FOV:  cropped to 68' × 45'; angular size of NGC 7789 is about 16'

Telescope:  Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)

Guiding:  ZWO ASI120MM mini mono guide camera,

Stellarvue F050G 50mm guide scope

Computer:  ASIair pro Raspberry Pi

Mount:  iOptron CEM40

Camera:  ZWO ASI071MC Pro Cooled (0°C) Color CMOS with gain 180

Filter:  Baader Light Pollution Moonglow filter with IR cut

Stacking:  Ten 200 second frames using Deep Sky Stacker

Total Time:  33 minutes 20 seconds

Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT,

GHS, HST, Mask, PMath GHS + HST + Mask, Sat, DynCrop/Scale

Location:  Darling Hill Observatory near Vesper, NY